Hydraulic molding-machine.



G. A, OERTZEN. HYDRAULIC MOLDING MACHINE.

APBLIOATION FILED JAN. 20, 1910.

Patented Ma 16,1911.

2 SHEETS-SHEET 1.

m: mmjus PETERS ca., wasumcrou. n. c.

G. A. OE RTZEN.

HYDRAULIC MOLDING MACHINE.

APPLICATION FILED JAILZO, 1910.

992,379. Patented May 16, 1911.

2 SHEETS-SHEET 2.

m: NORRIS PETERS co., wasumcrou, n. c.

UNITE STATES ATEN OFFICE.

GUSTAV ADOLF OERTZEN, OF DUSSELDOBF-OBERCASSEL, GERMANY.

HYDRAULIC MOLDING-MACHINE.

To all whom it may concern:

Be it known that I, GUSTAV ADoLr Oman ZEN, a citizen of the GermanEmpire, residing at Dusseldorf-Obercassel, Germany, have invented anImproved Hydraulic Molding- Machine, of which the following is aspecification.

This invention relates to a hydraulic molding machine for radiators andsimilar articles, which is freely accessible from all sides and in whichthe molding box is eflectively locked against pressure during themolding operation.

In the accompanying drawing: Figure l is a side elevation partly insection of a duplex molding machine embodying my invention, Fig. 2 across section of part thereof showing the counter pressure platelowered, Fig. 3 a similar section with the plate raised, and Fig. 4 aside elevation of part of the machine.

The molding press proper comprises a lower frame a supporting a cylinderat within which plays a hydraulic plunger 5. The latter is provided withan upper reduced section 6 received within a corresponding socket of afollower c that is seated on the annular shoulder 5 formed betweenplunger 5 and section 1). Follower 0 is guided by depending rods 0engaging perforated lugs a of frame a. Follower 0 supports the model ormold board M (Figs. 2 and which is reciprocable in a stationary sandreceiving frame (Z which is surmounted by the flask 6. Frame (Z isadapted to receive the necessary charge of sand prior to the applicationof flask e to said frame and to hold said charge before it is forcedinto the flask by the rise of plunger 5, as hereinafter de-.

scribed.

In order to-hold flask e in position during the molding operation, Iprovide a plate or abutment 9 adapted to be lowered upon flask c and tobe raised off the same, by hydraulic means. Plate 9 is secured to a yokes, which normally rests upon the toothed foot or rack z of a piston h.This piston is guided by rods 72,, 7L2 and plays within a cylinder 72,3mounted on an outrigger arm of an upper frame f which arm overhangslower frame a. For actuating plungers Z) and 7a, pumps 9 operated byhandles 1 are provided, which Specification of Letters Patent.

Application filed January 20, 1910.

Patented May 16, 1911.

Serial No. 538,991.

pumps may be coupled to cylinders a, h by conduits s, 25 respectively.

Piston h is movable independently from yoke s and plate 9, and its racki engages the inner toothed ends of a pair of two arm levers Z6, ispivoted at Z, Z to plate 9. The outer toothed ends of these levers areby wheels m, m, intergeared with the spindles n, n, of a pair of lockingbars or claws 0, 0. These claws are adapted to engage a pair ofprojections or keepers p, p formed on frame a.

After frame (Z has been filled, and box 6 superposed, piston 72, islowered, to lower plate 9 upon flask e. Bythe further independentdescent of piston it, within the upper chambered section of plate g,rack 2' will. by levers is, 70 and wheels m, m swing bars 0, 0 downwardand into engagement with keepers p, p. In this Way the upper moldsectionwill become securely interlocked with the lower section, so that plungerZ), may be advanced to effect the molding operation. The pressure Wateris then withdrawn from the cylinder of plunger 7), and piston h israised to first uncouple bars 0, 0- from keepers 7), p, and then raiseplate 9 off flask e. The flask may now be readily removed from eitherside of the machine, all of which is freely accessible to the operator.

I claim:

1. In a molding machine, a lower machine frame, a sand frame and asuperposed molding flask mounted thereon, and a plunger reciprocablewithin said frame, combined with an upper machine frame having astationary outrigger arm that overhangs the lower frame, a pistonmovable in said outrigger arm, an abutment on said piston and adapted tobe lowered upon the molding flask, and means actuated by the piston forlocking said abutment to the lower machine frame.

2. In a molding machine, a lower machine frame, a plunger and a moldingflask carried thereby, combined with an upper machine frame, a pistoncarried thereby, a yoke loosely supported by the piston, a pressureplate carried by the yoke, a pair of locking bars pivoted to the plateand operable by the piston, and keepers on the lower machine frameadapted to be engaged by said bars.

3. In a molding machine, a lower machine keepers on the loWer machineframe adapted frame, a plunger and a molding flask oarto be engaged bysaid bars.

ried thereby, combined With an upper ma- Signed by me at Barmen,Germany, this chine frame, a piston carried thereby and 3rd day ofJanuary 1910.

having a rack, a yoke loosely supported by GUSTAV ADOLF ()ERTZEN.

the piston, a presser plate carried by the lVitnesses:

yoke, toothed levers engaged by the rack, OTTO KoNIG,

looking bars intergeared With the levers, and CHAS. J. VRIGHT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

